Apparatus

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sensors Mode-S transponder

A9A8EE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N721TB · NORTH AMERICAN ROCKWELL Turbo Commander 690/840 · operated by TETON LEASING LLC

Hex
A9A8EE
Octal
52324356
Decimal
11,118,830
Country
US
Tail
N721TB
Type
AC90
No current signal · last broadcast Jul 26, 16:25 UTC
Flights observed
60
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 16:25 UTC

Last known position

Most recent position reported by Mode-S A9A8EE.

Country allocation

The ICAO 24-bit address A9A8EE falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 2 distinct

Callsign Airline Flights Last seen
AA1TB - 47 2026-07-26
N721TB - 13 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AA1TB - Jul 26, 16:05 UTCJul 26, 16:25 UTC20m
2026-07-25 AA1TB - Jul 25, 22:05 UTCJul 25, 22:25 UTC20m
2026-07-25 AA1TB - Jul 25, 20:00 UTCJul 25, 20:10 UTC10m
2026-07-25 AA1TB - Jul 25, 16:20 UTCJul 25, 16:40 UTC20m
2026-07-25 AA1TB - Jul 25, 01:50 UTCJul 25, 03:35 UTC1h 45m
2026-07-25 AA1TB - Jul 25, 00:30 UTCJul 25, 01:15 UTC45m
2026-07-18 AA1TB - Jul 18, 15:45 UTCJul 18, 15:55 UTC10m
2026-07-16 AA1TB - Jul 16, 21:55 UTCJul 16, 23:29 UTC1h 35m
2026-07-16 AA1TB - Jul 16, 18:19 UTCJul 16, 18:29 UTC10m
2026-07-16 AA1TB - Jul 16, 00:30 UTCJul 16, 00:40 UTC10m
2026-07-13 N721TB - Jul 13, 12:25 UTCJul 13, 13:45 UTC1h 20m
2026-07-13 N721TB - Jul 13, 01:50 UTCJul 13, 02:55 UTC1h 5m
2026-07-12 AA1TB - Jul 12, 21:00 UTCJul 12, 23:55 UTC2h 55m
2026-07-12 AA1TB - Jul 12, 15:15 UTCJul 12, 18:45 UTC3h 30m
2026-07-11 AA1TB - Jul 11, 23:05 UTCJul 12, 02:15 UTC3h 10m
2026-07-11 AA1TB - Jul 11, 17:30 UTCJul 11, 21:05 UTC3h 35m
2026-07-10 AA1TB - Jul 10, 23:30 UTCJul 11, 02:25 UTC2h 55m
2026-07-10 AA1TB - Jul 10, 17:40 UTCJul 10, 21:00 UTC3h 20m
2026-07-09 AA1TB - Jul 9, 23:40 UTCJul 10, 02:40 UTC3h 0m
2026-07-08 AA1TB - Jul 8, 20:15 UTCJul 8, 23:20 UTC3h 5m
2026-07-07 AA1TB - Jul 7, 21:25 UTCJul 8, 00:45 UTC3h 20m
2026-07-07 AA1TB - Jul 7, 15:25 UTCJul 7, 19:20 UTC3h 55m
2026-07-06 AA1TB - Jul 6, 21:05 UTCJul 7, 01:05 UTC4h 0m
2026-07-05 AA1TB - Jul 5, 23:20 UTCJul 6, 02:35 UTC3h 15m
2026-07-05 AA1TB - Jul 5, 18:00 UTCJul 5, 22:00 UTC4h 0m
2026-07-04 AA1TB - Jul 4, 18:30 UTCJul 4, 22:10 UTC3h 40m
2026-07-03 AA1TB - Jul 3, 18:00 UTCJul 3, 22:10 UTC4h 10m
2026-07-02 AA1TB - Jul 2, 21:20 UTCJul 2, 23:30 UTC2h 10m
2026-07-02 AA1TB - Jul 2, 19:50 UTCJul 2, 20:45 UTC55m
2026-07-01 AA1TB - Jul 1, 23:30 UTCJul 2, 02:10 UTC2h 40m
2026-06-30 AA1TB - Jun 30, 00:45 UTCJun 30, 01:35 UTC51m
2026-06-29 AA1TB - Jun 29, 23:25 UTCJun 29, 23:54 UTC30m
2026-06-29 AA1TB - Jun 29, 21:24 UTCJun 29, 22:49 UTC1h 25m
2026-06-29 AA1TB - Jun 29, 01:34 UTCJun 29, 02:05 UTC30m
2026-06-28 AA1TB - Jun 28, 22:29 UTCJun 28, 23:54 UTC1h 25m
2026-06-28 AA1TB - Jun 28, 18:10 UTCJun 28, 18:59 UTC50m
2026-06-28 AA1TB - Jun 28, 01:59 UTCJun 28, 02:10 UTC10m
2026-06-27 AA1TB - Jun 27, 23:14 UTCJun 28, 00:15 UTC1h 0m
2026-06-27 AA1TB - Jun 27, 20:29 UTCJun 27, 20:39 UTC10m
2026-06-27 AA1TB - Jun 27, 19:00 UTCJun 27, 19:15 UTC15m
2026-06-27 AA1TB - Jun 27, 17:25 UTCJun 27, 18:29 UTC1h 5m
2026-06-26 AA1TB - Jun 26, 20:04 UTCJun 26, 23:55 UTC3h 50m
2026-06-24 AA1TB - Jun 24, 01:04 UTCJun 24, 01:49 UTC45m
2026-06-17 AA1TB - Jun 17, 18:55 UTCJun 17, 19:35 UTC40m
2026-06-17 AA1TB - Jun 17, 03:35 UTCJun 17, 04:25 UTC50m
2026-06-16 AA1TB - Jun 16, 21:15 UTCJun 16, 22:00 UTC45m
2026-06-11 AA1TB - Jun 11, 00:25 UTCJun 11, 00:55 UTC30m
2026-06-10 AA1TB - Jun 10, 18:50 UTCJun 10, 19:05 UTC15m
2026-06-06 AA1TB - Jun 6, 23:15 UTCJun 6, 23:30 UTC15m
2026-06-03 N721TB - Jun 3, 13:40 UTCJun 3, 13:50 UTC10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N721TB page for operator, model, and routing details .

Mode-S A9A8EE frequently asked

What is Mode-S code A9A8EE?
A9A8EE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N721TB.
Where is Mode-S A9A8EE registered?
Mode-S code A9A8EE is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A9A8EE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9A8EE, octal 52324356, decimal 11,118,830.
What flights does A9A8EE operate?
Mode-S A9A8EE has broadcast 2 distinct callsigns, including AA1TB, N721TB.